Improved eoohng-oompound



, LORENZO D. FERGUSON, OF DANSVILLE, NEW YORK.

Letters Patent No. 79,645, dated July 7, 1868 IMPROVED ROOFING-COMPOUND.

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TO ALL WHOM IT .MAYDONOERN:

Be it known that I, LORENZO D. FEItuUsoN, of Dansville, in the county of IJivingsto n, and State of New York, have invented certain new and useful Improvements in CompoundforRoofing; and I do hereby declare that the following is a/full, clear, and exact description thereof.

The following are the ingredients and proportion's thereof used in'the preparation of my compound for roofing, and also my manner of using the same.

One part of. quicklime, one part of plumbago or black lead, one part oxide of iron, one part plaster of r Paris, one'part powderedv sulphur, one part common sand, orpulverized slate or stone, \vhich I mix with hot coal-tar to the consistency of common mortar, using two pounds of rosin to every barrel of tar. When this is (lone, the root being covered with felt, I spread the compound above described on said roof in the ordinary manner. After this process, I then coat the roofing wit-h asuitable quantity of oxide of iron or black-lead, over which'l passe. light roller. If the roof he steep, requiring the cement or compound to harden quickly,

dilute the hot tar with alkali prepared from potash or sol-soda. The'quioklime uniting with the watenlit will, in a few hours, become hardened, and thus prevent the tarry portion from running off the roof, thereby preventing waste. The iron or lead on the cement unites with the tar and forins a glazing, or hard,sm00tl1 surface, whichwill be perfectlywrater-proof.

, What I claim, and desire to secure by Letters Patent, is- V The combination of the ingredients herein specified, when used in the manner and for the purpose set forth. In testimony that I claim the foregoing as my own, I afiix my signaturein presence of two witnesses.

LORENZO D. FERGUSON. H

Witnesses I A. M. ANDERSON, J. G5,.Wn1crannnn. 

